So I am working a design to rotate a large drum at 5 deg/min (very large inertia) sitting upright on a bearing. I am able to take care of the gear ratios and motor HP calcs but what I am stuck on is how to determine the required torque to move this drum. I know that T = I*alpha but I can input...
It appears that NASTRAN can not compute bending due to an axial load...is this true? For instance, I calculated the deflection of a beam due to a lateral and axial load. When I modeled this in NASTRAN, it seemed to neglect the axial load and only calculate the deflection due to the lateral...
I am trying to model a torsional spring of a defined stiffness. My thought was to use the CBUSH element and define the stiffness in the Rz DOF (based on the way my model is setup). When I run the model, it is as if this restraint is ignored and the deflection is huge. Is there a better way to...
I have a question about what Beam Theory NASTRAN uses. Here are 2 simple cases that are yielding different results:
Trial 1:
- 2 nodes connected with a beam element
- Fixed at one end, free at the other
- Apply body load
Trial 2:
- 2 nodes connected with a beam same beam element
-...
Is there a way to use the output of one model to feed it into another? For example, lets say you have a beam with 3 nodes (each node is pinned..1g body load). Now after running a simulation for some dt and getting its response, you want to run another analysis with only 2 nodes pinned. The...
